Inflatable coaster



FIG. 1 is a perspective view of an inflatable coaster showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines shown in drawings are for the purpose of illustrating portions of the inflatable coaster and form no part of the claimed design. 

CLAIM The ornamental design for an inflatable coaster, as shown and described. 